display my nexus 7 screen

One of the reasons I got this was because I thought I could display my Galaxy 3 or Nexus 7 on the screen. But it looks like I can only do YouTube, Netflix, Google Play Movies, or a browser tab from a computer or laptop. But none of this interests me. I already have a system directly connected to my TV so I can already do all of that. Anyway, is there any future plans to display pictures or use Pandora, or project a browser page from one of these devices? (weird, carriage return doesn't work here) Thanks, -Jim